EP0563211B1 - Moulding compound and process for calendering polyethylene-based films - Google Patents

Moulding compound and process for calendering polyethylene-based films Download PDF

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Publication number
EP0563211B1
EP0563211B1 EP92902016A EP92902016A EP0563211B1 EP 0563211 B1 EP0563211 B1 EP 0563211B1 EP 92902016 A EP92902016 A EP 92902016A EP 92902016 A EP92902016 A EP 92902016A EP 0563211 B1 EP0563211 B1 EP 0563211B1
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European Patent Office
Prior art keywords
hdpe
temperature
moulding compound
mixture
polyethylene
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German (de)
French (fr)
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EP0563211A1 (en
Inventor
Karlo Klaar
Manfred Simm
Reiner Schoepe
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Sika Schweiz AG
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Huels Troisdorf AG
HT Troplast AG
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    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K5/00—Use of organic ingredients
    • C08K5/16—Nitrogen-containing compounds
    • C08K5/17—Amines; Quaternary ammonium compounds
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K5/00—Use of organic ingredients
    • C08K5/04—Oxygen-containing compounds
    • C08K5/09—Carboxylic acids; Metal salts thereof; Anhydrides thereof
    • C08K5/098—Metal salts of carboxylic acids
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L23/00—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers
    • C08L23/02—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers not modified by chemical after-treatment
    • C08L23/04—Homopolymers or copolymers of ethene
    • C08L23/06—Polyethene
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L23/00—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers
    • C08L23/02—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers not modified by chemical after-treatment
    • C08L23/04—Homopolymers or copolymers of ethene
    • C08L23/08—Copolymers of ethene
    • C08L23/0846—Copolymers of ethene with unsaturated hydrocarbons containing other atoms than carbon or hydrogen atoms
    • C08L23/0853—Vinylacetate
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L2205/00—Polymer mixtures characterised by other features
    • C08L2205/02—Polymer mixtures characterised by other features containing two or more polymers of the same C08L -group
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L2205/00—Polymer mixtures characterised by other features
    • C08L2205/02—Polymer mixtures characterised by other features containing two or more polymers of the same C08L -group
    • C08L2205/025—Polymer mixtures characterised by other features containing two or more polymers of the same C08L -group containing two or more polymers of the same hierarchy C08L, and differing only in parameters such as density, comonomer content, molecular weight, structure

Definitions

  • the invention relates to a method for producing films or sheets from high density polyethylene (HDPE) or a mixture of HDPE and ethylene-vinyl acetate copolymer (EVA).
  • HDPE high density polyethylene
  • EVA ethylene-vinyl acetate copolymer
  • Polyolefin films or sheets are predominantly produced using extrusion processes.
  • the production of films on the calender which is of great importance for other plastics, such as PVC, has so far not been successful in practice with polyolefins.
  • the calendering of a polypropylene molding composition is known, the molding composition having a defined amount of stabilizers and processing aids and the polypropylene having a certain melt index (MFI) which must not fall below a certain minimum value.
  • MFI melt index
  • DE-A1 30 32 851 relates to a similar process for a mixture of polypropylene with a max. 25% polyethylene.
  • films or sheets can be obtained from polyolefins using a calender if the surfaces of all the calender rolls are kept at a temperature above the crystallite melting point, each subsequent calender roll compared to the previous one at least in the ratio 1, Can lead 1: 1 and the working conditions on the calender are adjusted so that the kneading bodies forming in front of the nips rotate in themselves.
  • This process is primarily intended for polyethylene, with problems apparently due to the use of rubber-backed rollers.
  • the films produced in this way have a high monoaxial stretching and a poor surface quality. Because of the high tendency of polyethylene to stick and the low viscosity of the melt at the processing temperature this method was not able to establish itself in practice for polyethylene molding compounds.
  • the molding material used has an extremely low melt index MFI (190 ° C./21.6 kg) for polyethylene, which is ⁇ than 7 g / 10 min and preferably ⁇ than 6 g / 10 min.
  • the melt index can be increased to a maximum of 10 g / 10 min by adding 0.5 to 3% by weight of bisstearoylethylenediamine and / or metal salts of carboxylic acids as processing aids.
  • Particularly good surfaces are achieved if the molding composition has a melt index (190 ° C./21.6 kg) ⁇ 6 g / 10 min and a content of 0.5 to 3% by weight of bisstearoylethylenediamine and / or metal salts of carboxylic acids, in particular calcium stearate , as a processing aid.
  • Bisstearoylethylenediamine is preferably used.
  • the molding compound can additionally z. B. lubricants, stabilizers, fillers and flame retardants, with filler-free molding materials (filler contents ⁇ 10 wt .-%) are preferred.
  • the molding compound is mixed and plasticized at a temperature of approx. 170 - 180 ° C, then rolled out to a rolled skin at a temperature of 175 - 190 ° C and then calendered at a temperature of ⁇ 190 ° C.
  • the method according to the invention it is possible to produce perfect unfilled polyethylene films by calendering with good surfaces without monoaxial stretching. Possibly.
  • the calendered, unfilled or filled polyethylene films can contain anti-oxidants, UV absorbers, flame retardants - to meet special requirements. It is of course also possible to produce colored foils using pigments.
  • a preferred area of application for unfilled polyethylene foils is sealing in earthworks and hydraulic engineering for groundwater protection measures as well as for sealing drip pans and collecting rooms when storing water-polluting substances.
  • a preferred area of application for the calendered polyethylene films provided with fillers are packaging, file sleeves, cladding, etc.
  • the processing according to the invention is preferably carried out in such a way that the mass is mixed, for example as individual components or as a premix in an internal mixer, a stamp kneader or twin-screw kneader or the like, with heating until the mass is pasty and a mass temperature of about 175-185 ° C.
  • This mass is then drawn out in a second plasticizing step on rolls through a nip to form rolled skins, the rolls having a temperature of 170-190 ° C., preferably at least 180 ° C.
  • These well plasticized, homogeneous rolled skins are then fed to the calender, the calender should have at least four rolls, which can be arranged in the known form I, L, F or Z.
  • the calender rolls as seen in the working direction, have slightly decreasing temperatures, the first feed rolls should have the highest temperature, preferably 180-200 ° C., while the last calender roll has one 20 - 30 ° C lower temperature, since it essentially only serves for smoothing and calibration.
  • the process according to the invention can preferably be used to produce foils with a thickness of 0.2-2.0 mm, with roller take-off speeds and thus production speeds of at least 10 m / min and higher being possible, depending on the thickness of the foil.
  • the mass is mixed from the components and plasticized in a screw kneader until a melt temperature of 185 ° C is reached.
  • the plasticate is then drawn into rolled skins on a two-roll mill, the rolls of which are heated to 180-185 ° C, and then calendered on a four-roll mill to a 1 mm thick film, the first two rolls having a temperature of 195 ° C , the third roller has a temperature of 180 ° C and the fourth roller has a temperature of 175 ° C.
  • Bisstearoylethylenediamine (Hostalub R FA1) or calcium stearate (Ceasite R 1) were used as lubricants.
  • 21% by weight aluminum hydroxide (Martinal R OL 104 C) was added.

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  • Chemical & Material Sciences (AREA)
  • Health & Medical Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Medicinal Chemistry (AREA)
  • Polymers & Plastics (AREA)
  • Organic Chemistry (AREA)
  • Casting Or Compression Moulding Of Plastics Or The Like (AREA)
  • Compositions Of Macromolecular Compounds (AREA)
  • Manufacture Of Macromolecular Shaped Articles (AREA)
  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
  • Laminated Bodies (AREA)
  • Shaping Of Tube Ends By Bending Or Straightening (AREA)

Abstract

The description relates to a moulding compound for calendering synthetic thermoplastic films or plates and a process for producing films or plates of high-density polyethylene (HDPE) or a mixture of HDPE and ethylene-vinyl acetate copolymer (EVA). The moulding compound consists principally of: a1?) a HDPE or a HDPE mixture; or a2?) a mixture of HDPE and EVA; whereby the moulding compound has: b1?) a melting index MFI (190 C/21.6 kg) to DIN 53 735 of < 7 g/10 min; or b2?) a melting index MFI (190 C/21.6 kg) to DIN 53 735 of < 10 g/10 min and contains 0.5 to 3 % wt. bisstearoyl ethylene diamine and/or metal salts of carboxylic acids as processing auxiliaries. The moulding compound is mixed and plasticised at a temperature of about 170 to 180 C, rolled out to a web at a temperature of 175 to 190 C and finally calendered at a temperature of < 190 C.

Description

Technisches GebietTechnical field

Die Erfindung betrifft ein Verfahren zur Herstellung von Folien oder Platten aus Polyethylen hoher Dichte (HDPE) bzw. einer Mischung aus HDPE und Ethylen-Vinylacetat-Copolymerisat (EVA).The invention relates to a method for producing films or sheets from high density polyethylene (HDPE) or a mixture of HDPE and ethylene-vinyl acetate copolymer (EVA).

Folien oder Platten aus Polyolefinen werden in überwiegendem Maße unter Anwendung von Extrusionsverfahren hergestellt. Hingegen hat sich die Herstellung von Folien auf dem Kalander, die für andere Kunststoffe, wie PVC, große Bedeutung hat, bei Polyolefinen bisher in der Praxis nicht durchgesetzt.Polyolefin films or sheets are predominantly produced using extrusion processes. On the other hand, the production of films on the calender, which is of great importance for other plastics, such as PVC, has so far not been successful in practice with polyolefins.

Stand der TechnikState of the art

Aus der DE-C1 32 40 338, ist das Kalandrieren einer Polypropylen-Formmasse bekannt, wobei die Formmasse eine definierte Menge an Stabilisatoren und Verarbeitungshilfsmitteln und das Polypropylen einen bestimmten Schmelzindex (MFI), der einen bestimmten Minimalwert nicht unterschreiten darf, aufweisen muß.From DE-C1 32 40 338, the calendering of a polypropylene molding composition is known, the molding composition having a defined amount of stabilizers and processing aids and the polypropylene having a certain melt index (MFI) which must not fall below a certain minimum value.

Die DE-A1 30 32 851 betrifft ein ähnliches Verfahren für eine Mischung aus Polypropylen mit max. 25 % Polyethylen.DE-A1 30 32 851 relates to a similar process for a mixture of polypropylene with a max. 25% polyethylene.

Aus der AT-PS 211 040 ist bekannt, daß man aus Polyolefinen unter Benützung eines Kalanders dann Folien oder Platten erhalten kann, wenn man die Oberflächen sämtlicher Kalanderwalzen auf einer Temperatur oberhalb des Kristallitschmelzpunktes hält, jede nachfolgende Kalanderwalze gegenüber der vorhergehenden mindestens im Verhältnis 1,1 : 1 voreilen läßt und die Arbeitsbedingungen am Kalander so abstimmt, daß die vor den Walzenspalten sich bildenden Knetkörper in sich rotieren. Dieses Verfahren ist in erster Linie für Polyethylen bestimmt, wobei offensichtlich Probleme auftreten, da Abzugswalzen mit Gummibelag empfohlen wurden. Außerdem weisen die so hergestellten Folien eine hohe monoaxiale Reckung sowie eine mangelhafte Oberflächenqualität auf. Wegen der großen Klebneigung von Polyethylen und der geringen Viskosität der Schmelze bei der Verarbeitungstemperatur konnte sich dieses Verfahren in der Praxis für Polyethylen-Formmassen nicht durchsetzen.From AT-PS 211 040 it is known that films or sheets can be obtained from polyolefins using a calender if the surfaces of all the calender rolls are kept at a temperature above the crystallite melting point, each subsequent calender roll compared to the previous one at least in the ratio 1, Can lead 1: 1 and the working conditions on the calender are adjusted so that the kneading bodies forming in front of the nips rotate in themselves. This process is primarily intended for polyethylene, with problems apparently due to the use of rubber-backed rollers. In addition, the films produced in this way have a high monoaxial stretching and a poor surface quality. Because of the high tendency of polyethylene to stick and the low viscosity of the melt at the processing temperature this method was not able to establish itself in practice for polyethylene molding compounds.

Aus der DE-A1 25 46 237 und der US-A 4,010,127 ist eine hochmolekulare Formmasse auf Basis von Polyolefinen bekannt, die zur Erreichung einer ausreichenden Verarbeitbarkeit Zusätze wie Polybuten, Mineralöl und/oder Epoxyplastifizierungsmitteln enthält. Diese Zusätze erhöhen den Schmelzindex der Masse.From DE-A1 25 46 237 and US-A 4,010,127 a high molecular weight molding compound based on polyolefins is known which contains additives such as polybutene, mineral oil and / or epoxy plasticizers to achieve sufficient processability. These additives increase the melt index of the mass.

Aufgabetask

Aufgabe der vorliegenden Erfindung ist es daher, ein Verfahren zur Herstellung von Folien auf Polyethylen-Basis durch Kalandrieren zur Verfügung zu stellen, wobei reproduzierbar qualitativ hochwertige Folien mit guter Oberflächenbeschaffenheit und geringer monoaxialer,Reckung hergestellt werden können.It is therefore an object of the present invention to provide a process for the production of polyethylene-based films by calendering, it being possible to reproducibly produce high-quality films with good surface properties and low monoaxial stretching.

Darstellung der ErfindungPresentation of the invention

Die Erfindung löst diese Aufgabe durch die Merkmale des Anspruchs 1.The invention solves this problem by the features of claim 1.

Die eingesetzte Formmasse weist einen für Polyethylen extrem niedrigen Schmelzindex MFI (190 °C/21,6 kg) auf, der < als 7 g/10 min und bevorzugt < als 6 g/10 min ist. Durch den Zusatz von 0,5 bis 3 Gew.-% Bisstearoylethylendiamin und/oder Metallsalzen von Carbonsäuren als Verarbeitungshilfsmittel kann der Schmelzindex auf maximal 10 g/10 min erhöht werden. Besonders gute Oberflächen werden erzielt, wenn die Formmasse einen Schmelzindex (190 °C/21,6 kg) < 6 g/10 min und einen Gehalt von 0,5 bis 3 Gew.-% Bisstearoylethylendiamin und/oder Metallsalzen von Carbonsäuren, insbesondere Kalziumstearat, als Verarbeitunghilfsmittel aufweist. Bevorzugt wird Bisstearoylethylendiamin eingesetzt.The molding material used has an extremely low melt index MFI (190 ° C./21.6 kg) for polyethylene, which is <than 7 g / 10 min and preferably <than 6 g / 10 min. The melt index can be increased to a maximum of 10 g / 10 min by adding 0.5 to 3% by weight of bisstearoylethylenediamine and / or metal salts of carboxylic acids as processing aids. Particularly good surfaces are achieved if the molding composition has a melt index (190 ° C./21.6 kg) <6 g / 10 min and a content of 0.5 to 3% by weight of bisstearoylethylenediamine and / or metal salts of carboxylic acids, in particular calcium stearate , as a processing aid. Bisstearoylethylenediamine is preferably used.

Die Formmasse kann zusätzlich z. B. Gleitmittel, Stabilisatoren, Füllstoffe und Flammschutzmittel aufweisen, wobei füllstofffreie Formmassen (Füllstoffgehalte < 10 Gew.-%) bevorzugt werden.The molding compound can additionally z. B. lubricants, stabilizers, fillers and flame retardants, with filler-free molding materials (filler contents <10 wt .-%) are preferred.

Die Formmasse wird bei einer Temperatur von ca. 170 - 180 °C gemischt und plastifiziert, danach bei einer Temperatur von 175 - 190 °C zu einem Walzfell ausgewalzt und anschließend bei einer Temperatur < 190 °C kalandriert.The molding compound is mixed and plasticized at a temperature of approx. 170 - 180 ° C, then rolled out to a rolled skin at a temperature of 175 - 190 ° C and then calendered at a temperature of <190 ° C.

Mit dem erfindungsgemäßen Verfahren ist es möglich, einwandfreie ungefüllte Polyethylenfolien durch Kalandrieren mit guten Oberflächen ohne monoaxiale Reckung herzustellen. Ggf. können die kalandrierten, ungefüllten oder gefüllten Polyethylenfolien Antiioxidantien, UV-Absorber, Flammschutzmittel - um besonderen Anforderungen gerecht zu werden - enthalten. Es ist natürlich auch möglich, farbige Folien durch Verwendung von Pigmenten herzustellen.With the method according to the invention it is possible to produce perfect unfilled polyethylene films by calendering with good surfaces without monoaxial stretching. Possibly. The calendered, unfilled or filled polyethylene films can contain anti-oxidants, UV absorbers, flame retardants - to meet special requirements. It is of course also possible to produce colored foils using pigments.

Ein bevorzugtes Anwendungsgebiet für die ungefüllten Polyethylenfolien sind Abdichtungen in Erd- und Wasserbau für Grundwasserschutzmaßnahmen sowie zum Abdichten von Auffangwannen und Auffangräumen bei der Lagerung wassergefährdender Stoffe.A preferred area of application for unfilled polyethylene foils is sealing in earthworks and hydraulic engineering for groundwater protection measures as well as for sealing drip pans and collecting rooms when storing water-polluting substances.

Ein bevorzugtes Anwendungsgebiet für die mit Füllstoffen versehenen kalandrierten Polyethylenfolien sind Verpackungen, Aktenhüllen, Verkleidungen, etc.A preferred area of application for the calendered polyethylene films provided with fillers are packaging, file sleeves, cladding, etc.

Die erfindungsgemäße Verarbeitung erfolgt bevorzugt in der Weise, daß die Masse beispielsweise als Einzelkomponenten oder als Vormischung in einem Innenmischer, einem Stempelkneter oder zweiwelligen Schneckenkneter o. ä. unter Erwärmung gemischt wird, bis die Masse teigig ist und eine Massetemperatur von etwa 175 - 185 °C aufweist. Diese Masse wird dann in einem zweiten Plastifizierungsschritt auf Walzen durch einen Walzenspalt zu Walzfellen ausgezogen, wobei die Walzen eine Temperatur von 170 - 190 °C, bevorzugt wenigstens 180 °C, aufweisen. Diese gut plastifizierten, homogenen Walzfelle werden dann dem Kalander zugeführt, wobei der Kalander wenigstens vier Walzen aufweisen sollte, die in der bekannten Form I, L, F oder Z angeordnet sein können.The processing according to the invention is preferably carried out in such a way that the mass is mixed, for example as individual components or as a premix in an internal mixer, a stamp kneader or twin-screw kneader or the like, with heating until the mass is pasty and a mass temperature of about 175-185 ° C. This mass is then drawn out in a second plasticizing step on rolls through a nip to form rolled skins, the rolls having a temperature of 170-190 ° C., preferably at least 180 ° C. These well plasticized, homogeneous rolled skins are then fed to the calender, the calender should have at least four rolls, which can be arranged in the known form I, L, F or Z.

Die Kalanderwalzen haben, in Arbeitsrichtung gesehen, leicht abfallende Temperaturen, wobei die ersten Einzugswalzen die höchste Temperatur, vorzugsweise 180 - 200 °C, aufweisen sollten, während die letzte Kalanderwalze eine um 20 - 30 °C niedrigere Temperatur haben kann, da sie im wesentlichen nur der Glättung und Kalibrierung dient.The calender rolls, as seen in the working direction, have slightly decreasing temperatures, the first feed rolls should have the highest temperature, preferably 180-200 ° C., while the last calender roll has one 20 - 30 ° C lower temperature, since it essentially only serves for smoothing and calibration.

Es können nach dem erfindungsgemäßen Verfahren bevorzugt Folien einer Dicke von 0,2 - 2,0 mm hergestellt werden, wobei Walzenabzugsgeschwindigkeiten und damit Produktionsgeschwindigkeiten von mind. 10 m/min und höher erreicht werden können, in Abhängigkeit von der Dicke der Folie.The process according to the invention can preferably be used to produce foils with a thickness of 0.2-2.0 mm, with roller take-off speeds and thus production speeds of at least 10 m / min and higher being possible, depending on the thickness of the foil.

Wege zur Ausführung der ErfindungWays of Carrying Out the Invention

Bei den nachfolgend aufgeführten, in der Tabelle dargestellten Beispielen wird aus den Komponenten die Masse gemischt und in einem Schneckenkneter anplastifiziert, bis eine Massetemperatur von 185 °C erreicht ist. Anschließend wird das Plastifikat auf einem Zweiwalzen-Walzwerk, dessen Walzen auf 180 - 185 °C geheizt sind, zu Walzfellen ausgezogen und danach auf einem Vierwalzen-Walzwerk zu einer 1 mm dicken Folie kalandriert, wobei die ersten beiden Walzen eine Temperatur von 195 °C, die dritte Walze eine Temperatur von 180 °C und die vierte Walze eine Temperatur von 175 °C aufweisen.In the examples shown below, shown in the table, the mass is mixed from the components and plasticized in a screw kneader until a melt temperature of 185 ° C is reached. The plasticate is then drawn into rolled skins on a two-roll mill, the rolls of which are heated to 180-185 ° C, and then calendered on a four-roll mill to a 1 mm thick film, the first two rolls having a temperature of 195 ° C , the third roller has a temperature of 180 ° C and the fourth roller has a temperature of 175 ° C.

Als thermoplastische Kunststoffe wurden verwendet:

HDPE1:
ein Polyethylen hoher Dichte mit extrem kleinem Schmelzindex MFI (190 °C/21,6 kg) von ca. 0,5 g/ 10 min (Lupolen R 5261 Z);
HDPE2:
ein Polyethylen hoher Dichte mit geringem MFI (190 °C/21,6 kg) von 16 g/10 min;
EVA:
ein Ethylen-Vinylacetat-Copolymerisat mit 18 Gew.-% VA-Anteil/Excorene R AG 0548;
The following were used as thermoplastics:
HDPE1:
a high density polyethylene with an extremely small melt index MFI (190 ° C / 21.6 kg) of approx. 0.5 g / 10 min (Lupolen R 5261 Z);
HDPE2:
a high density polyethylene with low MFI (190 ° C / 21.6 kg) of 16 g / 10 min;
EVA:
an ethylene-vinyl acetate copolymer with 18% by weight of VA / Excorene R AG 0548;

Als Gleitmittel wurden Bisstearoylethylendiamin (Hostalub R FA1) bzw. Kalzium-Stearat (Ceasit R1 ) verwendet. In Beispiel 10 wurden 21 Gew.-% Aluminiumhydroxid (Martinal R OL 104 C) zugesetzt.

Figure imgb0001
Bisstearoylethylenediamine (Hostalub R FA1) or calcium stearate (Ceasite R 1) were used as lubricants. In Example 10, 21% by weight aluminum hydroxide (Martinal R OL 104 C) was added.
Figure imgb0001

Claims (4)

  1. Method for the manufacture of foils or plates from a moulding composition consisting predominately of:
    a1) a HDPE or a HDPE mixture or
    a2) a mixture of HDPE and EVA
    with the moulding composition having
    b1) a melt index MFI (190°C/21.6kg) according to DIN 53735 of < 7g/10 min or
    b2) a melt index MFI (190°C/21.6kg) according to DIN 53735 of < l0g/l0 min
    and a content of 0.5 to 3% by weight of bisstearoylethylenediamine and/or metal salts of carboxylic acids as processing aids, characterised in that the moulding composition is mixed and plasticized at a temperature of about 170°C to 180°C, is next rolled out to form a crude sheet at a temperature of 175°C to 190°C and is then calendered, with the first calendering roller having a temperature of 180°C-200°C and the further calendering rollers having decreasing temperatures.
  2. Method according to claim 1, characterised in that the moulding composition has a melt index (190°C/21.6kg) of < 6g/10 min and a content of 0.5 to 3% by weight of bisstearoylethylenediamine and/or metal salts of carboxylic acids as processing aids.
  3. Method according to one of claims 1 or 2, characterised in that the moulding composition has a filler content of < 10% by weight.
  4. Method according to one of claims 1 or 2, characterised in that the moulding composition contains up to 30% by weight of aluminium hydroxide as filler.
EP92902016A 1990-12-21 1991-12-13 Moulding compound and process for calendering polyethylene-based films Expired - Lifetime EP0563211B1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE4041453 1990-12-21
DE4041453A DE4041453A1 (en) 1990-12-21 1990-12-21 SHAPE DIMENSIONS AND METHOD FOR CALENDARING FILMS BASED ON POLYETHYLENE
PCT/EP1991/002403 WO1992011315A1 (en) 1990-12-21 1991-12-13 Moulding compound and process for calendering polyethylene-based films

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EP0563211A1 EP0563211A1 (en) 1993-10-06
EP0563211B1 true EP0563211B1 (en) 1997-04-16

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EP (1) EP0563211B1 (en)
AT (1) ATE151798T1 (en)
CZ (1) CZ283372B6 (en)
DE (2) DE4041453A1 (en)
DK (1) DK0563211T3 (en)
ES (1) ES2099817T3 (en)
GR (1) GR3024072T3 (en)
HU (1) HU214152B (en)
SK (1) SK280122B6 (en)
TW (1) TW201320B (en)
WO (1) WO1992011315A1 (en)

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DE9404700U1 (en) * 1994-03-19 1995-07-20 Ewald Dörken AG, 58313 Herdecke Dimpled sheet for construction purposes
KR102358766B1 (en) * 2020-05-22 2022-02-04 한화토탈 주식회사 Polyethylene resin composition and separator for secondary battery produced therefrom

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SK50693A3 (en) 1993-10-06
DE4041453A1 (en) 1992-06-25
HU9301806D0 (en) 1993-09-28
HU214152B (en) 1998-01-28
ATE151798T1 (en) 1997-05-15
TW201320B (en) 1993-03-01
CZ283372B6 (en) 1998-04-15
DE59108669D1 (en) 1997-05-22
EP0563211A1 (en) 1993-10-06
SK280122B6 (en) 1999-08-06
ES2099817T3 (en) 1997-06-01
WO1992011315A1 (en) 1992-07-09
GR3024072T3 (en) 1997-10-31
CZ93493A3 (en) 1994-01-19
HUT66615A (en) 1994-12-28
DK0563211T3 (en) 1997-05-20

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